Journal
SMALL
Volume 17, Issue 19, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202100102
Keywords
data storage; microscale; multilevel; nonvolatile memory; organic electronics
Categories
Funding
- City University of Hong Kong [9380117]
- 111 Project [D20015]
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University [sklssm2020041]
- National Natural Science Foundation of China [22008164]
- Natural Science Foundation of Jiangsu Province [BK20190939]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [19KJB150018]
- NSF of China [21938006, 21878199, 11704272]
- Six Talent Peaks Project of Jiangsu Province, China [XCL-078]
- Jiangsu Key Disciplines of the Thirteenth Five-Year Plan [20168765]
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The solid-state transition from disordered orientations to highly-uniform orientation within the ORM layer can be easily triggered via molecular strategic tailoring. The study reveals that the solid-state crystalline nanostructural order of organic materials can be controlled by reasonable molecular design to activate high-performance organic electronic circuits.
Organic resistive memory (ORM) offers great promise for next-generation high-density multilevel-cell (MLC) data storage. However, the fine tuning of crystalline order among its active layer still remains challenging, which largely restricts ORM behavior. Here, an exceptional solid-state transition from disordered orientations to highly-uniform orientation within the ORM layer is facilely triggered via molecular strategic tailoring. Two diketopyrrolopyrrole-based small molecular analogues (NI1TDPP and NI2TDPP) are demonstrated to display different symmetry. The asymmetric NI1TDPP shows an irregular solid-state texture, while the centro-symmetric NI2TDPP conforms to an ordered out-of-plane single-crystalline pattern that aligns with the foremost charge transportation along the substrate normal, and exhibits excellent MLC memory characteristics. Moreover, this highly oriented pattern guarantees the large-area film uniformity, leading to the twofold increase in the yield of as-fabricated ORM devices. This study reveals that the solid-state crystalline nanostructural order of organic materials can be controlled by reasonable molecular design to actuate high-performance organic electronic circuits.
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